Photometric follow-up of the transiting planet WASP-1b

Abstract

We report on photometric follow-up of the recently discovered transiting planet WASP-1b. We observed two transits with the Wise Observatory 1m telescope, and used a variant of the EBOP code together with the Sys-Rem detrending approach to fit the light curve. Assuming a stellar mass of 1.15 M_sun, we derived a planetary radius of R_p = 1.40 +- 0.06 R_J and mass of M_p = 0.87 +- 0.07 M_J. An uncertainty of 15% in the stellar mass results in an additional systematic uncertainty of 5% in the planetary radius and of 10% in planetary mass. Our observations yielded a slightly better ephemeris for the center of the transit: T_c [HJD] = (2454013.3127 +- 0.0004) + N_tr * (2.51996 +- 0.00002). The new planet is an inflated, low-density planet, similar to HAT-P-1b and HD209458b.

arXiv commentRevised version accepted for publication in MNRAS

References in corpus (14)

• Analytic Lightcurves for Planetary Transit Searches
• The WASP Project and the SuperWASP Cameras
• Wide-field millimagnitude photometry with HAT: A Tool for Extra-solar Planet Detection
• Correcting systematic effects in a large set of photometric lightcurves
• On the Radii of Extrasolar Giant Planets
• Spectroscopic metallicities for planet-host stars: extending the samples
• HAT-P-1b: A Large-Radius, Low-Density Exoplanet Transiting one Member of a Stellar Binary
• A diagram for the evaporation status of extrasolar planets
• Atmosphere, Interior, and Evolution of the Metal-Rich Transiting Planet HD 149026b
• The XO Project: Searching for Transiting Extra-solar Planet Candidates
• Obliquity Tides on Hot Jupiters
• On the Period Distribution of Close-In Extrasolar Giant Planets
• An intriguing correlation between the masses and periods of the transiting planets
• Automated analysis of eclipsing binary lightcurves. I. EBAS -- a new Eclipsing Binary Automated Solver with EBOP

Cited by in corpus (22)

• The 3.6-8.0 Micron Broadband Emission Spectrum of HD 209458b: Evidence for an Atmospheric Temperature Inversion
• Homogeneous studies of transiting extrasolar planets. I. Light curve analyses
• Efficient identification of exoplanetary transit candidates from SuperWASP light curves
• Theoretical Spectra and Light Curves of Close-in Extrasolar Giant Planets and Comparison with Data
• Homogeneous studies of transiting extrasolar planets. II. Physical properties
• An Improved Method for Estimating the Masses of Stars with Transiting Planets
• A method for the direct determination of the surface gravities of transiting extrasolar planets
• Cassini States with Dissipation: Why Obliquity Tides Cannot Inflate Hot Jupiters
• Detection of a Temperature Inversion in the Broadband Infrared Emission Spectrum of TrES-4
• The Transit Light Curve Project. VII. The Not-So-Bloated Exoplanet HAT-P-1b
• Ground-based near-UV observations of 15 transiting exoplanets: Constraints on their atmospheres and no evidence for asymmetrical transits
• TESS Transit Timing of Hundreds of Hot Jupiters
• Extrasolar Planet Transits Observed at Kitt Peak National Observatory
• Hot Jupiters and the evolution of stellar angular momentum
• HAT-P-9b: A Low Density Planet Transiting a Moderately Faint F star
• ExoClock Project III: 450 new exoplanet ephemerides from ground and space observations
• HAT-P-4b: A metal-rich low-density transiting hot Jupiter
• The spin-orbit angles of the transiting exoplanets WASP-1b, WASP-24b, WASP-38b and HAT-P-8b from Rossiter-McLaughlin observations
• ExoClock project II: A large-scale integrated study with 180 updated exoplanet ephemerides
• WASP-1: A lithium- and metal-rich star with an oversized planet
• TASTE IV. Refining ephemeris and orbital parameters for HAT-P-20b and WASP-1b
• A large-scale survey for variable stars in M33